Soil aggregate size distribution and stability following Conventional-till, Minimum-till and No-till systems
Journal Title: International Journal of Farming and Allied Sciences - Year 2014, Vol 3, Issue 5
Abstract
The present study was carried out to clarify the effects of some soil physical and chemical specifications on soil aggregates size distribution and stability under different tillage methods. Conventional tillage cause to break soil aggregates especially in loamy soils consequently increase soil sensitivity to water and winderosion. On the other hand, soil aggregate size distribution and aggregate stability are the two important physical properties of the soil with profound effects on soil health. Thus, soil sensitivity to destruction might be a criterion for evaluating soil agronomic capacity that may be defined by its stability i.e. physical structure. In an experiment carried out in 2011-12 crop season at agricultural education and research farm of Tehran University, Karaj. Iran (35048’N, 510’E, and 1321m above sea level) using randomized complete block design in split-plot arrangement with three replications physical soil parameters of aggregates size distribution and stability were studied. Three tillage methods (No-till, Min-till and Conventional-till) and three bread wheat cultivars (Pishtaz, Pishgam and Bahar) were allocated to the main and sub-plots, respectively. Results showed that No-till was significantly different comparing to the other two methods in aggregates particles size distribution along with increasing aggregate stability index such as mean weight diameter, geometrical mean of particle diameter, water stable aggregate index and total soil nitrogen. However, Minimum-till was significantly different with Conventional-till in above mentioned properties (p<0.05) .
Authors and Affiliations
Aminollah Mousavi Boogar, Mohammad Reza Jahansouz and Mohammad Reza Mehravar
Keywords
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